Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1e755a2559f2f2…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 08:49:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e6e9dafa65acdfe4b80da9e4333417e SHA-1: c8cdc9c9e7f0a4060f2ffb95e3197b15adf964f6 SHA-256: da1e755a2559f2f20b520d3ef01dfd788e3b2b3273ee90d85a1fdc314ff05233
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/give-free-robux-game-hack PDF link annotation
    • https://au-ma.com/image/data/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://au-ma.com/image/data/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D81 29124 bytes
SHA-256: ea4721f2000f0eec59786ac42b6ebd536e63d00fe967f000a2aed9a32f46558a
font_01_sfnt_off00009065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 18248 bytes
SHA-256: ea59f1cb8b041c2b832a039673c57edae81c360e33a5bea04888abdf43ec1c43

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